Dizziness, fainting, poor circulation to areas such as fingers and toes

3 of 32

Explain how narrowed coronary arteries, together with a thrombosis, increase the risk of a heart attack

The narrowing of the arteries caused by plaques in the coronary arteries reduces blood flow to heart muscles. The plaque makes thrombosis more likely to happen, which also blocks the artery.

4 of 32

What does a diet have to contain to increase the risk of heart disease?

Heart disease is caused by restricted blood flow to the heart muscles, a diet must have high level of saturated fat, which leads up to the build up of cholesterol, and high levels of salt, which increases blood pressure

5 of 32

Where are carbohydrates and fats stored in the body and what are they converted to?

The arrival of an impulse triggers the release of neurotransmitters which diffuses across the synapse, the substance binds with recptor molecules in the membrane of the next nuerone

16 of 32

Explain why damage to ciliated cells can lead to a 'smoker's cough'

Dust and particulates in cigarette smoke collect and irritate the epithelial lining which causes the build up of mucus which doesn't get moved by cilia as they got damaged by the smoke

17 of 32

Explain the action of depressant drugs on synapses

Depressants bind to the receptor molecules on the next neurone and block transmission of the nerve impulse, which reduces activity at synapses

18 of 32

Explain the action of stimulant drugs on synapses

Causes more transmitter substance to diffuse across the synapse

19 of 32

Describe the dangerous effects of high and low temperatures on the body

High: Causes heat stroke and dehydration | Cold: hyperthermia

20 of 32

Explain how negative feedback mechanisms are used in homeostasis

Level changes away from steady, the sense organs detect the change and send info to the brain's control centre, which sends info back to body structures which sets processes in motion to redress the balance and bring the level back to steady